1 x Introduction (3.00 avg depth)
11 x Closed Variation (14.27 avg depth)
14 x Open System (12.43 avg depth)
6 x Morozevich Variation (11.83 avg depth)
7 x Rubinstein Variation (11.71 avg depth)
3 x Guimard Defense (13.67 avg depth)
4 x Modern System (11.00 avg depth)
